Unit 3- Chlamydia Flashcards
Reasons for Intracellularity
Protection from permeable cell membrane, ATP shortage, cholesterol demand
Chlamydia and Coxiella Lifecycle
Spore like particle extracellularly, actively replicates inside host cells
Chalmydia Intracellular
Reticulate inclusion bodies
Coxiella Intracellular
Large cell variant
Anaplasma and Ehrlichia Intracellular
Reticulate cells (morula)
Chlamydia Extracellular
Elementary body
Coxiella Extracellular
Small cell variant
Anaplasma and Ehrlichia Extracellular
Dense cored cells
Rickettsia Intracellular
Freely moves in cytoplasm without hiding in vacuoles
Anaplasma Transmission
Ticks
Ehrlichia Transmission
Ticks
Rickettsia Transmission
Ticks, lice, mites, fleas
Coxiella Transmission
Airborne
Chlamydia Transmission
Airborne, sex, elementary body contagious transmission
Mycoplasma Transmission
Airborne
MAKePSR Syndrome
Mastitis, arthritis, keratoconjunctivitism, pneumonia, septicemia, reproductive disorder caused by chlamydia and mycoplasma tropism for mucous membranes
Rickettsiales Predilection Sites
RBC, WBC, or blood vessels
Iceberg Concept
Presence of clinical cases indicates huge members have subclinical infection, multiple species may be involved
Chlamydia
Gram neg cocci, little peptidoglycan, giemsa stain best, obligate intracellular
Why is Chlamydia obligate intracellular?
Cytoplasmic membrane highly permeable, cannot produce amino acids and ATP
Chlamydia Elementary Body
Extracellular form, environmentally resistant, airborne, infects vertebrates
Chlamydia Aberrant Body
Characterizes persistent infection, formed during stressful conditions from antimicrobials or host immune
Chlamydia Hosts
Some interspecies transmission, wide variety of hosts
Chlamydia Pathogenesis
Attacks columnar epithelium of epithelial cells and mucous membranes
Chlamydiosis
MaKePSRRD syndrom
Chlamydia abortus
Ovine abortion storms and placentitis, follicular vaginitis in cow
Chlamydia Virulence Factors
Neuraminidase, catalase, protease, LPS, T3SS, intracellular survival
Gold Standard Test for Chlamydia
Indirect immunofluorescent IgG antibody assay
Chlamydia Culture
Requires living cell lines, chicken embryo, buffalo green monkey kidney cells
Chlamydia Treatment
Antibiotics early in infection, induces aberrant bodies in persistent chlamydial infection
Chlamydia abortus Vaccine
Prevents abortion in small ruminant
Chlamydia felis Vaccine
Prevents keratoconjunctivitis in pets
Chlamydia Groups
Avian, Mammalian, Human